The Maryland Transit Administration (MTA), a division of the Maryland Department of Transportation is one of the largest multi-modal transit systems in the U.S. Below is an overview of the Maryland Metro Subway (Washington Metro) routes. Pay particular attention to the colors assigned to each of the lines. Depending on where you want to go, you may have to switch routes/trains to a different color.
Get detailed information on routes by going to the MDOT website.
Here is the same map increased in size a bit so it may be easier to see details. The cars show parking available. Round circles denote station stops. Colors are metro system lines. Double circles are transfer stations.